thiosinamine

from The Century Dictionary.

• noun A colorless compound, SC(NH₂)NHCH₂CH: CH₂, prepared by the action of aqueous ammonia on allyl is othiocyanate (allyl mustard oil). It forms monoclinic or rhombic crystals and melts at 78.4° C. Also called allylthio-urea or allylthiocarbamide.